Patents by Inventor Philip B. Mitchell

Philip B. Mitchell has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Conductive secondary backings and tufted carpets made therewith
    Patent number: 4138519
    Abstract: Secondary backing for a tufted carpet comprising a fabric with an open construction having an air permeability preferably of at least about 350 cfm of a synthetic yarn and a conductive spun yarn wherein said spun yarn comprises a conductive core fiber having a denier in the range of about 15 to about 25 and a maximum resistance of about 1 .times. 10.sup.10 ohms/centimeter around which core fiber is spun a nonconductive support fiber having a denier in the range of about 3 to 18. The conductive spun yarn can be in the warp and/or weft direction of said backing at an apparent weight density of conductive fiber as low as 0.6 grams/square meter and still dissipate a static charge to a value in kilovolts below about 4.5.
    Type: Grant
    Filed: September 6, 1977
    Date of Patent: February 6, 1979
    Assignee: Standard Oil Company (Indiana)
    Inventor: Philip B. Mitchell
  • Syringe pump
    Patent number: D1021072
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: April 2, 2024
    Assignees: DEKA Products Limited Partnership, CAREFUSION 303, INC.
    Inventors: Larry B. Gray, Thomas A. Friedrich, Craig A. Dodge, Gregory T. Hulan, Philip T. Pupa, Christopher J. Murray, Edward G. Mitchell
  • Syringe pump
    Patent number: D1021073
    Type: Grant
    Filed: February 22, 2021
    Date of Patent: April 2, 2024
    Assignees: DEKA Products Limited Partnership, CAREFUSION 303, INC.
    Inventors: Larry B. Gray, Thomas A. Friedrich, Craig A. Dodge, Gregory T. Hulan, Philip T. Pupa, Christopher J. Murray, Edward G. Mitchell